Means for making paper-board.



PATENTED FEB. 14, 1905;

T. W. MQFARLAND. MEANS FOR MAKING PAPER BOARD.

APPLICATION FILED JUNE 3, 1895.

2 SHEETS-SHEET 1.

No. 782,354. PATENTED FEB. 14, 1905.

T. W. MoPARLAND.

MEANS FOR MAKING PAPER BOARD.

APPLIOATION TILED mm: 3, 1895.

2 SHEETS-SHEET 2.

Patented February 14, 1905."

UNITED STATES PATENT OEEIoE.

THOMAS W. MOFARLAND, OF CHICAGO, ILLINOIS.

MEANS FOR MAKING PAPER-BOARD.

SPECIFICATION forming part of' Letters Patent No. 782,354, dated February 14, 1905.

Application filed. June 3, 1895. Serial No. 5551, 177.

To all whom it may concern/.-

Be it known thatLTHoMAs W. MoFARLAND, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Means for Making Paper- Board, of which the following is afull, clear, and exact specification.

My invention relates to means for laying up the sheetknown in the art of paper-making as the web to form the board and also means for drying the board thus produced.

The primary object of my invention is to produce extraordinarily large sheets of paper or fiber board in a commercially successful and practicable manner.

With these ends in view my invention consists in certain features of novelty in the construction, combination, and arrangement of parts by which the said objects and certain other objects hereinafter appearing are attained, all as fully described with reference to the accompanying drawings, and more particularly pointed out in the claims.

In the said drawings, Figure 1 is an elevation of my improved apparatus, the wet machine being shown partially in vertical section. Fig. 2 is a cross-section of the laying-up drum or form with its casing and connected parts. Fig. 3 is a side elevation of a portion thereof, showing the cutter. Fig. 4 is an enlarged detail end elevation of the cutter mechanism, showing a part of the laying-up drum and casing in vertical cross-section. Fig. 5 is a plan view thereof with the drum and casing omitted, and Fig. 6 is an enlarged cross-section of one of the rollers.

In carrying out my invention I run the web or tissue of which the board is composed upon a winding-drum or similar laying-up form so as to lay up the tissue or web and produce a board in the form of a tube or cylinder, which is dried on either its inner or outer side, or both, but preferably on its inner side only, while being formed or laid up. This tubular form is then cut longitudinally of its axis, so as to form one or more sheets, which are subsequently thoroughly dried by being subjected to heat and pressure simultaneously. This its shrinkage on the drum.

operation results in a dried or cured board curved or having amarked tendency to curve in the direction conforming to the circumference of the drum or cylinder on which it was wound; but in order that thiscurvature may not be excessive in the finished board 1 subsequently make the board substantially flat or straight by any suitable means. The board or web of which the board is composed being wound tightly around the drum while in a wet state and allowed to dry on the drum will be compressed and solidified by virtue of In the apparatus for producing these results, A represents the wet machine in which the web 1' isp'roduced, and 8 is the laying-up drum orcylirider. The Wet machine A may be of the usual or any suitable construction. In the form shown the drum 2, which picks up the pulp and carries it to the felt 3, is driven by a connection 4: from pulley 5 or from any other suitable source of power. The belt 3 delivers the web between the usual pair of pressure-rolls, the upper one, 6, of which supports the lower end of an endless belt or conveyor 8 L, composed of felt orother suitable material, and whose upper end is supported by an idle roll 85. The idle roll 85 is journaled in a frame 86, which is pivoted on the center of the roll 6, so that the upper roll 85 may rest by gravity on the periphery of the laying-up drum or cylinder 8, and thus conduct the web or tissue to the latter while resting freely thereon and conforming to thesurface thereof with a uniform degree of pressure. The drum 8 is journaled in a jacket or casing 7 9 and is driven in the proper direction of rotation by any suitable'means, such assprocket-wheel 13 and chain 14., which connects said sprocket to a sprocket 9, driven by belts 1O 10 from pulley 5 or other'suitable source of power. The journal of drum 8 may be provided with steam-pipe '18, so as to supply the interior of the drum with steam for heating the board on the inside as it is laid up, while'the jacket or casing 79 is provided at the bottom with a flue or inlet 81 for hot air or other suitable heating medium, which 'envelopsthe drum 8 and the web thereon, and thus heats the' drum on the outside. The upper side of the casing 79 is provided with an outlet 82 for the steam and moisture rising from the drying-board, and this may be in communication with an uptake-flue 83. The casing 79 is provided in one side with a longitudinal slit 9 for the admission of'the pressure-roll and the web on the belt 84:, so that as the drum 8 revolves in a direction away from the -roll 85, or upwardly, the web, which adheres to the lower fold of the belt or conveyer 84:, will be carried by the drum away from the roll 85 as the latter acts to press such layer of the web firmly against the previous layer, the frame 86, with the roll 85 and conveyer 84, resting by gravity upon the drum 8, as before described. The paste usually employed for causing the layers of the web to adhere together may be supplied thereto in any suitable waysuch, for example, as by putting it in the vat of the wet machine-and as the web passes onto the drum 8 each succeeding layer is firmly pressed into close adhesion with the preceding layer by means of a pressure-roll 19, which is yieldingly held in contact with the drum by springs or other cushions interposed between sliding bloeks 21, in

which the journals of the roll 19 are mounted, and the plate 22, to which is secured an adjusting-screw 23, whereby the pressure of roll 19 may be regulated as desired, the screw 23 passing through the end of an arm 24, in

which the block 21 slides, and the arm 24 being mounted on the casing 79. The roll 19 is also located in a longitudinal slot or aperture 9 in the'casing 79.

In order that the outer or upper surface of the web may not be calendered or smoothed by the pressure-roll 19 to such an extent as to prevent the paste from causing the succeeding layer to adhere to the precedingone, the surface of the pressure-roll 19 may be provided with some yielding-substance or material, such as felt or short bristles 19, which will have the desired effect of crowding the web firmly against the cylinder without ironing out the fine filaments on its outer side and destroying its capability of adhering to the succeeding layer. a It is of course understood that the first layer of the web is run upon the drum 8 without being supplied with pastefor example, before the paste is placed in the vat of the wet machineso as to prevent it from sticking to the drum.

If desired, one or two additional rollers 25 26 may be mounted at the opposite side of the drum upon the casing 79 in suitable arms or brackets 25 27 a for calendering the outer surface of the board after a sufiicient 2am: r Li layers of the web have been laid 5-,,- produce the requisite thickness, and if found desirable one of these rollers 25 26, preferably the latter one, may have an embossed surface for imparting to the board any desired surface configuration or ornamentation; otherwise the two rollers 25 26 would have plain smooth surfaces. These rollers 25 26 project through longitudinal slots 9 9, respectively, in the casing 79 and are mounted in sliding blocks 29 in their respective arms or brackets 25 27 and which blocks are held by springs 30 and adjusting-screws .31 in the manner described with reference to roller 19.

32 represents a roll of cloth or other fabric, journaled in arms 33 on the casing 79, and from which the fabric may be carried to the drum and incorporated in the board between the layers of the web, the fabric being started around the lower side of roller 19 and carried around by the drum while adhering to the pasted surface of the paper thereon.

It is of course understood that the drum, the conveyer 84, and the belt 3 are driven at the same surface speed from a common driving-shaft 10 from which motion is transmitted to the pulley 9 by belt 10 and to the pulley 5 by belt 10 or by other suitable means.

By the employment of the belt or conveyer 84; and the roll 85 the surface of the web on the drum 8 will be given avrough or filamentlike surface to a large extent even in the absence of a felt surface on the pressure-roll 19, and, moreover, the roll 85 takes the place in a large degree of the roll .19, so far as its function of pressing the layers into con tact is concerned, and hence, if desired, the roll 19 may be moved out of contact with the paper until the board is fully laid up, whereupon the frame 86 will be thrown back to carry roller 85 out of the way, and the roller 19 may then be utilized for smoothing the outer surface of the complete board. In that event the roller 19 would of course be provided with a smooth surface.

When it is desired to remove the board from drumor cylinder 8, it is cut longitudinally of its axis by any suitable means, but preferably by a circular saw or cutter 35, journaled on a carriage 36, which is mounted to slide longitudinally of the drum on a suitable way 37, supported upon brackets 38 on the casing 79. The saw 35 is connected by a train of gears 39 with a hand-wheel 40, whereby the saw may be rapidly revolved while advancing along the drum, the train of gears 39 and hand-wheel 10 being also mounted upon carriage 36 and the casing 79 being of course provided with a longitudinal slit 7 9, through which the saw or cutter passes. As illustrated in Figs. 1 and 4, one of the brackets 38 is supported at each side of the casing 79, and the way 37 extends across and is s pported by said brackets, the way and ....ge having a dovetail connection 36 arranged above the upper edges of the brackets 38. In the operation of this cutter the carriage is advanced or pushed along the way by hand, and at the same time the saw is revolved by means of the hand-wheel 40.

IIO

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is

1. An apparatus for producing paper-board having in combination a hollow rotary winding-drum for laying up the web, a casing or jacket surrounding said drum, and having a longitudinal slit formed therein for the admission of the web, a bottom opening for the admission of a heating medium, an opening for the egress of moisture, means for rotating said drum and means for supplying the interior of said drum with a heating medium, substantially as set forth.

2. An apparatus for producing paper-board having in combination a rotary winding-drum I for laying up the web. a casing or jacket surrounding said drum and having a longitudinal slit formed therein for the admission of the web, a bottom opening for the admission of a heating medium, an opening for the egress of moisture, a longitudinal slit for the admission of a cutting implement and a cutting implement arranged to pass along the said lastnamed slit, substantially as set forth.

3. An apparatus for producing paper-board having in combination a hollow rotary winding-drum for laying up the web, a casing or jacket surrounding said drum and having a longitudinal slit formed therein for the admission of the web, a pressure-roll arranged to bear against the periphery of the drum for pressing the web thereagainst, means for revolving the drum, and means for supplying a heating medium to the interior of the drum, said casing having an opening for the escape of moisture, substantially as set forth.

4. An apparatus for producing paperboard having in combination a wet machine for producing a web, a laying-up drum and a pivoted endless carrier or conveyer located between said wet machine and laying-up drum and resting upon said laying-up drum, substantially as set forth.

5. An apparatus for producing paper-board having in combination a wet machine for producing the web, a laying-up drum, a frame, a roller journaled in each end of said frame, an endless carrier passing around said rollers and extending between said wet machine and laying-up drum, said frame being pivoted at one end and the roller at the other end of said frame resting by gravity upon said drum, substantially as set forth.

6. An apparatus for producing paper-board having in combination a wet machine for producing the web, a rotary drum for winding or laying up the web, a rotary cutter, a carriage upon which said cutter is mounted and provided with means for revolving said cutter against the paper-board on said drum, and a guide or way for said carriage arranged longitudinally of said drum, whereby the board may be cut from the said drum, substantially as set forth.

7. The combination with a wet machine and a hollow laying-up drum on which a number of the layers of the web are to be laid for making heavy boards, and a roll resting on said drum, ofa carrying-web passing around the press-roll of the wet machine and over said roll resting on said laying-up drum, the latter roll being pivotally supported, so as to oscillate concentrically about the axis of said press-roll, substantially as and for the purpose set forth.

THOMAS VV. MCFARLAN D. Witnesses: Y

F. A. HOPKINS, EDNA B. J OHNSON. 

